SQL:SELECT p.*,min(ps.price) as minimum_price from BC_products_sizes as ps, BC_products as p LEFT JOIN BC_categories as bc ON p.categories_id = bc.categories_id LEFT JOIN BC_products_colors as pc ON p.products_id = pc.products_id where p.active='Y' and p.products_id=ps.products_id and ps.active='Y' and ( ) group by ps.products_id LIMIT 0,3mysql_error:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') group by ps.products_id LIMIT 0,3' at line 1ERROR TEXT: